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Supplemental Cash Flow Information (Tables) | 3 Months Ended
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Mar. 31, 2015
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
|  | Three Months Ended March 31, |
|  | 2015 |  |  | 2014 |
|  | (in thousands) |
Net cash provided from operating activities included: |  |  |  |  |  |  |  |
Income taxes paid to taxing authorities |  | $ | — |  |  | $ | 39 |
Interest paid |  |  | 54,284 |  |  |  | 55,190 |
Non-cash investing and financing activities included: |  |  |  |  |  |  |  |
Increase in asset retirement costs capitalized |  |  | 15,813 |  |  |  | 3,218 |
(Decrease) increase in accrued capital expenditures |  |  | (110,622 | ) |  |  | 6,808 |

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